11x + 7 / 2x - 5
simplify:9x+8-7x-y-4
exp(10 * r) - (10.2 * r + 1)<0
the factorised form of (15pq+15+9q+25p) answer
3/4+1/2
16+/31/
2k-$k^{2}$ = -3
if a:b=3:1 and b:c=3:1 find the ratio a:c
if p=xy-15,find the value of p when x=5 and y=10
$x^{2}$ + $x$ +1 = 0
